Concrete-culvert form.



G. W. STORMS.

CONCRETE cuLvERT roam.

APPLICATION FILED IAN. 4, I9I6.

Patented Jan. 9,1917, E921 3,890 3 SHEETS-SHEET I.

G. W. STORMS.

'CONCRETE CULVERT FORM. APPLICATION FILED 1AN.4. 191e.

1,211,890. Amaimed Jan. 9,1917.

3 SHEETS-SHEET 3.

nvevvtoz atbo'rum GEORGE W. STORMS, OF LOUISVILLE, KENTUCKY.

CONCRETE-CULVERT FORM.

Specication of Letters Patent.

Y Patented J an. 9, 1917.

Application filed January 4, 1916. Serial No. 70,192.

To all whom it may concern:

Be it known that I, GEORGE W. SToRMs, a citizen of the United States, and a resident of Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Concrete-Culver-t Forms, of which the fol-` lowing is a specification, reference being had to the accompanying drawings, form# ing a part of this specification.

This invention relates to certain new and useful improvements in culvert forms; and the primary object of my invention is to provide a form so constructed that the same may be readily set up to provide a form which can bey instantly collapsed after rthe monolithic structure has hardened and set. Another objectl is to provide a culvert form including a plurality of form sections which are held and rest upon a plurality of base members which can be withdrawn under force, resulting in a collapse of the form so that the saine can be readily removed.

Vith these and other objects in view the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and finally pointed out in the appended claims, it being further understoodrthat changes in the specic structure shown and described may be made within the scope ofthe claims without departing from the spirit of the invention. In the accompanying drawings forming a part of this specification, andY in which like numerals of reference indicate similar parts the several views: Figure 1 shows a longitudinal sectional view of a concrete culvert form constructed according to my inventigon. Fig.- 2 is a transverse sectional view through the form showing'the supporting frame. partly collapsed4 in dottedlines. Fig. 3 shows a plan view. Fig. 4c shows'the form structure detached and partly collapsed. vFig. 5 shows a; perspective detail of a modiiication, which discloses a round top; culvert form. Fig.V 6 is a detached` detailI disclosing the method: of securingy the frameA members` toV the edge bars.,

In my present invention I provide a collapsible concreteY culvert form which is. so

constructed that the same can be readily removed after the monolithic structure has hardened.

In carrying out theaimof my invention I provide a form which 'is made up of a plurality,1 of similar sections-,;and in Figs. 1 and 3 I have shown a form comprising two form sections each including two collapsible supporting frames which are connected to a plurality of base members which are comj mon to each form section. v

The form sections are adjusted according to the length of culvert to be built and include a main sectional draw bar comprising the two similar sections 1 and 1. These sections are held together by means of a suitable bolt c, shown in Fig. 3. According to the construction the main draw bar can be lengthened or shortened. Pivotally secured to each draw bar section are two front arms 2, 2 and two rear arms 3, 8, these arms being secured by means of the pivot bolts 4,

this construction permitting the lengthening or shortening of the arms. As shown the arms 2, 2 are disposed in sets of twos and extend in opposite directions. Secured pivotally to the ends of each set of arms are two angle iron edge bars 5', 5, these bars being held in parallel spaced relation upon opposite sides of the main draw bar.

. Secured to each edge bar, which are preferably made ofl ordinary 'angleirom are the ears 8, 8 giving support to thepivot pins b, shown in Fig. y6, which in `tui-"n pivotally hold the lower sidel bars 6. These side bars 6 are arranged to fold and pivot inwardly and secured to each side bar 6 isa set bolt a inturn supporting an upper side bar 7,'each sid'e bar 7 havingV a socket 9 and: at its npper end carrying a pivot pin 5, as shown in Fig. 2. l

` Pivotally seciired toA each upper side bai' 7 is a top bar 9, thesey top bars* being carried upon the pivotL pins b. These` top bars are employed in sets of twos and are adjustably connected by means of a pivotbolt a, one of these pivot bolts being shown in Fig. 2. Extending upward from: the base portion of each angle iron bar are two shackled loops 15, 15 each@ shackled loop giving support te a brace bar 16, thesey bracci barsrhaving reduced ends 10 arranged to fit into theisockets 9', asshown in Fig. 6. These brace bars 16 are employed to assist in holding the extension side bars` in vertical4 position.

In: orderto support the pivotally connected top barst) I employv aV pluralityof' rectangular drop'y frames 10y each including two side legs 11', 1:1 and a bracebar` 12 whichn is securedI to the'sidelegs 11 and to the cen'. tral part of eachy framexftliisC construction being clearly showny in Fig..2.V TheVA flat top portion of each drop frame 10 is arranged to hold the vertically disposed top bars 9 in alinement. In order to hold the frame members 10 against rcasual displacement I provide each at one end with a notched ear 13 arranged to engage the lower edge of one of the top bars 9, this construction being clearly shown in Fig. 2.

I-Ield parallel to the main draw bar and upon opposite sides are the two -sectional supporting draw bars 19. These side draw bars 19 are arranged to be held upon the laterally extending arms 2, 2 and 3, 3', as shown in Fig. 3, and form a brace which gives support to the frame.

The mold casing is in the form of fiat boards B which are placed upon the base forming the bottom of the culvert against the edge bars 5 and against the extension side'bars 6 and 7, as shown in Fig. 2.

The uppermost boards B are of such a width that their edges end in alinement with the upper edge of the adjusted side bars and resting upon these side boards B and supported by the top bars 9 are the top boards B, as shown in Fig. 2.

In the drawings a short culvert is shown including the use of but two form sections. Where long culverts are employed the number of form sections are increased, so that a culvert form might comprise one or more form sections.

After the culvert form has been set up the material iscast about the same, the walls being made of any suitable thickness, and after the monolithic structure has set the culvert form isready to be removed. This is easily accomplished in manually withdrawing rst the two sectional supporting side draw bars 19, 19. As these draw bars are pulled forward the lower ends of the drop frame legs 11 are also carried forward, resulting in the frames dropping, and as soon as these frames drop the top bars 9,9, also drop being deprived of their support, as shown in dotted lines in Fig. 2. The downward movement of the top bars 9 results in the arms 6 and 7 being drawn inward, thus releasing the upper or top members as well as the upper side boards. After all the loose boards have been removed and the drop frames have also been withdrawn the main draw bar 1 is carried forward, which results in the two edge bars 5, 5 being carried toward one another to release the lower side boards. The entire form construction is then ready to be removed leaving the interior of the culvert free and unobstructed. In Fig. 4' I have shown the position of the arms when the main draw bar is drawn forward.

In Figs. 1, 2, 3 and 4 I have shown a rectangulaln culvert form. If desired a round top may be used, in which case, for instance, I provide the angle iron edge bars 5, 5 with the pivotally held curved side bars 23, shown in Fig. 5, These curved side bars 23 are held in vertical position by means of the shackled brace bars 16 exactly as has been described heretofore. In this modification, however, I employ a drop frame comprising the two side bars 24, which are notched at their upper ends, and connected by means of the top bar 25 and the bottom bar 26. This drop frame is held upon the side draw bars 19 and operates exactly as has been described. I-Ield within the notches within the upper ends of the bars 24 are the upper ends of the curved side bars 23.

This culvert form can be compactly folded while not in use. The form is further simple and inexpensive in construction and both durable and efficient in operation, and can be readily set up and instantly collapsed.

Having thus described my said invention what I claim as new and desire to secure by Letters Patent is:

1. The combination in a concrete culvert form frame, of a main draw bar, oppositely directed laterally extending arms pivoted to said draw bar and disposed in sets of twos, two angle iron edge bars pivotally secured to said arms and held in parallel spaced relation, a lower side bar loosely secured to each end of said edge bars, an upper side bar adjustably secured to each lower side bar, a top bar pivotally secured to each ripper side bar, pivot bolts securing said top bars in sets of twos, two side supporting draw bars arranged in parallel spaced relation and adjacent to said main draw bar, and a supporting frame supported by said side draw bars each supporting a set of pivotally connected top bars, as and in the manner set forth.

2. The combination in a concrete culvert form frame, of a main draw bar, oppositely directed laterally extending arms pivoted to said draw bar and disposed in sets of twos, two angle iron edge bars pivotally secured to said arms and held] in `parallel spaced rel ation, a lower` side bar loosely secured to each end of said edge bars, an upper side bar having a socket adjustably secured to each lower side bar, a top bar pivotally secured to each upper side bar, pivot bolts securing said top bars in sets of twos, two side supporting draw bars arranged in parallel spaced relation and adjacent to said main draw bar, a supporting frame supported by said side draw bars each supporting a set of pivotally connected top bars, and brace bars loosely secured to each of said angle iron edge bars each engaging a socket within a Aside bar whereby said side bars are held in upright position.

3. The combination in a concrete culvert form frame, of a main draw bar, oppositely directed laterally extending arms pivoted to said draw bar and disposed in sets of twos, two angleiron edge bars pivotally secured to said arms and held in parallel spaced re lation, a lower side bar loosely secured to each end of said edge bars, an upper side bar having asocket adjustably secured to each lower side bar, a top bar pivotally secured to each upper side bar, pivot bolts securing said top bars in sets of twos, two side supporting draw bars arranged in parallel spaced relation and adjacent to said main draw bar, a supporting frame supported bysaid side draw bars each supporting a set of pivotally connected top bars, a notched ear secured to each supporting frame in engagement with one of said top bars, and brace bars loosely secured to each of said angle iron edge bars each in engagement with a socket within a. side bar whereby said side bars are held in upright position.

In testimony whereof I aiiix my signature, in the presence of two Witnesses.

GEORGE W. STORMS. Witnesses:

CAROLINE E. LANG, CHAs. A. LANG.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D C. 

